signals.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:4k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * signals.c : signals handler module for vlc
- *****************************************************************************
- * Copyright (C) 2008 Rémi Denis-Courmont
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <signal.h>
- #include <time.h>
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_interface.h>
- static int Open (vlc_object_t *);
- static void Close (vlc_object_t *);
- static void *SigThread (void *);
- vlc_module_begin ()
- set_shortname (N_("Signals"))
- set_category (CAT_INTERFACE)
- set_subcategory (SUBCAT_INTERFACE_CONTROL)
- set_description (N_("POSIX signals handling interface"))
- set_capability ("interface", 0)
- set_callbacks (Open, Close)
- vlc_module_end ()
- struct intf_sys_t
- {
- vlc_thread_t thread;
- };
- static int Open (vlc_object_t *obj)
- {
- intf_thread_t *intf = (intf_thread_t *)obj;
- intf_sys_t *p_sys = malloc (sizeof (*p_sys));
- if (p_sys == NULL)
- return VLC_ENOMEM;
- intf->p_sys = p_sys;
- if (vlc_clone (&p_sys->thread, SigThread, obj, VLC_THREAD_PRIORITY_LOW))
- {
- free (p_sys);
- intf->p_sys = NULL;
- return VLC_ENOMEM;
- }
- intf->pf_run = NULL;
- return 0;
- }
- static void Close (vlc_object_t *obj)
- {
- intf_thread_t *intf = (intf_thread_t *)obj;
- intf_sys_t *p_sys = intf->p_sys;
- vlc_cancel (p_sys->thread);
- #ifdef __APPLE__
- /* In Mac OS X up to 10.5 sigwait (among others) is not a pthread
- * cancellation point, so we throw a dummy quit signal to end
- * sigwait() in the sigth thread */
- pthread_kill (p_sys->thread, SIGQUIT);
- # endif
- vlc_join (p_sys->thread, NULL);
- free (p_sys);
- }
- static bool ignored (int signum)
- {
- struct sigaction sa;
- if (sigaction (signum, NULL, &sa))
- return false;
- return ((sa.sa_flags & SA_SIGINFO)
- ? (void *)sa.sa_sigaction : (void *)sa.sa_handler) == SIG_IGN;
- }
- static void *SigThread (void *data)
- {
- intf_thread_t *obj = data;
- sigset_t set;
- int signum;
- sigemptyset (&set);
- if (!ignored (SIGHUP)) /* <- needed to handle nohup properly */
- sigaddset (&set, SIGHUP);
- sigaddset (&set, SIGINT);
- sigaddset (&set, SIGQUIT);
- sigaddset (&set, SIGTERM);
- sigaddset (&set, SIGCHLD);
- do
- {
- while (sigwait (&set, &signum));
- #ifdef __APPLE__
- /* In Mac OS X up to 10.5 sigwait (among others) is not a pthread
- * cancellation point */
- vlc_testcancel();
- #endif
- }
- while (signum == SIGCHLD);
- msg_Err (obj, "Caught %s signal, exiting...", strsignal (signum));
- libvlc_Quit (obj->p_libvlc);
- /* After 3 seconds, fallback to normal signal handling */
- msleep (3 * CLOCK_FREQ);
- pthread_sigmask (SIG_UNBLOCK, &set, NULL);
- for (;;)
- pause ();
- }